Multipane window sash



Aug.l 5, 1952 MULTIPANE WINDOW sAsH Filed Jan. 12, 1946 G. H. BUGENHAGEN Patented ug. 5, 1*"952M UNITED STATES PATENT FFICE e. Y 2,605,519 i f I MULTIPANE WINDOW SASH George H. Bugenhagen, Midland, Mich. `Application January 12, 1946, Serial No. 640,835

' The invention relates to multipane window construction with a sealed air space between each paneof the transparentmedium. It more particularly concerns a sash for glass windows wherein two or more'` panes of glass may be superposed on each other with a sealed dead air space therebetween. It is, therefore, an object of the invention to provide a window sash adapted to accommodate more than one pane of glass in superposed relation with a sealed air space therebetween.

Another object of the invention is to provide a metal sash for multpane window construction wherein provision is made for differences in expansion between the metal and the glass.

Another object of the invention is to provide a metal sash 'with' enclosed chambers into which the glass extends and is adapted to slide back and forth during expansion and contraction, said enclosed chambers being partially filled with an elastic cement to eifect an air tight seal between the metal parts of the sash and glass.

Still anotherk object of the invention is to provide a .cushioning medium within the enclosed chambers in the metal sash contacting the elastic cement so that the elastic cement will be snugly pressed against the glass and the walls of the chambers during expansion and contraction of the glass.

Another object of the invention is to provide a metal sash-which can be adjusted to grip the surface of glass panes'having some variation i thickness.

Another object of the invention is to provide a metal window sash which may be readily taken apart for removal of broken panes and replacement, or other repair work.

Another object of the invention is to provide a multipane window sash construction in whichthe 3 Claims. (Cl. 20-56.5)

cement eifecting the seal between the glasspane f ing drawing disclosing certain means of carrying lo ut the invention, such disclosed means `illusv"mating, however, but several of various ways in which the principle of the invention may be practiced. l 1

Fig. 1A is a non-detail side elevation of the --window sash. .v v

Fig. 2 is a sectional view along lines 2`2f of Fig. 1 looking in the direction of the arrows, showing, however, the sash of Fig. 1 secure'dto a wooden sill. K f L l Fig. 3 is a view alonglines 3-3 of Fig-1, partly in section, looking in the direction-of the arrows.

Fig. 4 is an enlarged detail of the corner construction of the sash. e

Fig. 5 is a section view along lines 5--5 of Fig. 3 showing a corner section, however. Y Y

Fig. 6 is a sectional view along lines 6--6 of Fig. 5.

Fig. 7 is a sectional view along lines 1-1 of Fig. 2.

Fig. 8 is an enlarged sectional viewsimilar. `toV Fig. 2 showing, however, a modification ofthe invention.

Referring to Fig- 1, a metal framedesignated generally by numeral I supports the glass pane 2. As seen more clearly in Fig. 2 the. metal sash I abuts or is seated on the wood sill 3 at 4 and isv retained or held securely thereto by meansV of clip 5v and screws 6. The metal `frame itself ,is a hollow composite structure andisrformedlfso as to have two identical chambers 1, enclosed by the metal shell and separated Afrom each other by a general U-shaped channel section 8 formed by web members 9 and I0 of the` metalwsh'ell. Flat headed screws II are provided aty suitable intervals along the metal frame and extendfrom the back face I2 of the metal sash tothe .front face I3 which it engages in threaded relation at I4. The screws I I serve to pull the two outer lip portions I5 and I6 ofthe back and front" faces I2 and I3 together and 'thus presses theglas' 2 against cooperating inner lip members ll'fan'd I8 formed by the extension of, webs `9y aIidL'IIlj.

The web sections 9 and I0 are convenientlyheld apart a proper distance by spacers Izwhich'ride on at headed screw II. This construction' a1- lowsjglass panes of different'thicknesses'to be used in the same sash by virtue of the 'wide .latitude of adjustment affordedr byA the'V double web. As shown, the glassv panes 2V extend into the chambers 'I through the slotted openings'` '20 formed along the inner face of the s'ash. 'Within the two chambers 1, the glass panes 2 are'surrounded by elastic or non-hardening. putty 2|, which fills the chambers'to a' pointrpreferably above the ends orv edges ofthe glass panesZ. Flexible strips 22 which are shown injthisjinstance as sponge rubber but might be of any fibrous material of a yieldable nature "rll'lf the rest of the chambers 'I and are'held' in place'fbyA reason `of their' extension' overthe 'flathead screws II. Iny this mannerY a `sealedordeadgair 3 space 23 is maintained between the identical panes of glass 2.

In Fig. 3, the section has been takenY at a slightly different point to show screw plugs 2li which act to seal openings 25 provided for the attachment of a putty gun (not shown), whereby addition of elastic putty to the chambers 1 may be readily made.

Referring to Fig. .4, a corner elevation is shown in enlarged detail. The sashI is cut at a 45 angle at the corner to form a snug tting miter joint 26 between the separate sections of the sash. The separate sections are held rmly together by means of bracket 21 which is engaged by screw bolts 28 as seen more clearly 1in Fig.'5.

The operation of the invention will be best un.- derstood from the following description, wherein the window is assembled with the frame I in four sections. The flat headed screws I I will be removed while the sponge rubber strips 22 are inserted through the slotted openings 2l). Flat headed screws I I are then inserted with spacer I9 in place and started into threaded engagement atA I4so as to hold the sponge rubber strip22 in place but without pulling the two faces I2 and I3 together. Bracket 21 is then attached and two sections are fastened together thereby. Thereafter,

,1. the panes of glass 2 may be suitably inserted through the slotted openings 20 in the partially In Figs. 5 and 6, the corner construction isv shown in enlarged detail. The manner in which the sponge rubber strip 22 is held in place at the top of the chambers 1 by the action Vof the nat head screws II in, pressing the sponge rubber strip upwardly againstv the top of the chamber is seen more clearly Yirijlig. 5. In order tov effect a seal so that air will not escape or enter the dead air space 23 at the miter joint 25, hole 29 is provided through the lower portion of the web sections 9 and I0, seen more clearly in Fig. 6. A

assembled sash and, after the position of the glass pane is suitably adjusted, screws II will be Y taken up until the glass panes are snugly engaged portion of the circumference of hole 29 is open to the air through U-shaped channel 8. In this manner air that might follow along the metal at the miter joint 26 and enter the air space 23 is eiectively blocked by the sealing action of the putty entering the hole 29. A small amount of putty will squeeze out into the U-shaped channel 8 at .the miter.joint,.but the action of the air will soon harden the surface and stop further loss at this point. It Vwill be apparent that the sash maybe made up in four sections or, if desired, only two sections need be used wherein a mitered -joint will vbe used at adjacent corners or at opposite corners.

In the sectional elevational view of Fig. 7, the relation of the wood'sil1f3, the sash I, the rubber strip 22, compressing screw II and the glass pane V2 is seen in clearer detail.

In the enlarged Asectional elevational View of Fig. 8, a modication ofA the invention is shown.

-The metal frame 30 is separated into two .identical ychambers 3I-by the metal webl 32. .The metal web is provided with a thickened section33 which isV tapped and threaded at intervals Ato accom- `modate screws 34 extending through from either "face in staggered relation. In `this manner, the

tension Vof the lip portions V35, 36, 31, and 38 against the glasspanes'may be readily regulated. Sponge rubberY strips 39 are held in place in either chamber'SI by screws 313,V and a non-hardening sealing material llllfllls the remainder of the chambers inthe manner describedin connection with the modication of Figs. 2 and 3.

At the corners or at other points where sections of the metal sashare coupled in abutting relation, it will, of course, be desirable to provide a hole through the web at the point of abutment so that air will' be blocked from" following along r ubbergasketmay beinse'rted attire point fof coa- ...7.5

by the lips I5, I1, I6, and I8, respectively, of the two sections. Thereafter, another section of frame I may be added and secured inplace by a bracket 21, or, if desired, two more sections may be made up Vas described above and added asa unit. In any case, when the frame is completely assembled and screws I I have been suitably tightened to hold the glass panes securely in place, the non-hardening putty 2| may be added. In adding the putty, it will be desirable to start at one point and work around the frame I.` For example, the operation of adding the putty 2I may be conveniently started at the bottom of the frame. It will be desirable to remove the adjacent screw plugs 24 and add the putty 2| through one of the holes with arconventional putty gun provided with a tting adapted to engage the plug hole until the putty can be seen comingv out the next hole indicating thatfthe space in chamber 1 between the holes is completely filled. Thereafter, the next plug 2li will be removed andthe process repeated until the chambers 1 around the entire sash are completely lled with putty. The window may then be placed in the sill 3 and secured therein by means of retaining clip 5.

Sponge rubber is ideally suited for use in the chamber along with the vnon-hardening putty, or the like, because .any vexpansion of the glass due to heating will simply force the putty or other similar sealing material up against the rubber. The rubber will readily yield to the force without attendant high pressure such as would be encountered if the .entire chamber 1 were filled with uid. It will be lgenerally desirable to choose a type of sponge rubber such as one of the new synthetics which is unaffected by the sealing material being used. Other materials may be used in the place of rubber. For example, any nbrous yieldable material will serve such as oakum, loose pile fabric, and the likel While the conventional non-hardening putty is very suitable for use in connection with sealing around the edges vof `the glass panes, other materials may be used such as non-hardening viscous tars or viscous polymers produced by partial polymerization of synthetic resin-forming materials. Many such materials are readily commercially available.

It is to be understood that, while the vinvention has been described with reference to only two glass panes with a single air space sealedt'herebetween, it is within thescope of the invention to extend the metal shell to provide one or more additional chambers similar to those shown jand other glass panes for any desired Vnun'flber'of sealed air spaces. Additionally, while the metal sash has been described as being rectangular in shape to accommodate" the usual rectangular panes of glass, it might be conveniently vad'e circular, oval, or diamond shape without essential modication.

Other modes of applying the principle of my invention may be employed instead of those explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I, therefore, particularly point out and distinctly claim as my invention:

1. In a multipane window sash, the combination which includes a metal shell enclosing two chambers sealed from each other by a metal web, said metal shell having spaced slotted openings along the inner face opening into the chamber adapted to accommodate the edge portions of the glass panes, lip portions integral with thel metal shell adjacent the slotted openings adapted to slip over and resiliently grip the edge portions of the glass panes, means to adjust the tension with which the lip portions grip the glass, a sponge rubber strip mounted in each chamber on the wall opposite the slotted openings, a nonhardening putty filling the remainder of said chambers, and coupling means carried by the metal shell adapted to hold sections of the metal shell in abutting relation, said abutting sections having their chambers in communication with each other through the metal web below the sponge rubber strips at the point of abutment.

2. In a multipane window sash construction, the combination which includes a rectangular metal shell enclosing two chambers separated from each other by a metal web, said metal shell having spaced slotted openings along the inner face opening into the chambers adapted to accommodate the edge portions of the glass panes, lip portions integral with the metal shell adjacent the slotted openings adapted toresiliently grip the edge portions of the glass panes, means to adjust the tension with which the lips grip the glass, sponge rubber strips mounted in the chambers on the wall opposite the slotted openings, a non-hardening putty filling the remainder of the chambers, said metal shell having miter joints at the corners, a bracket adapted to revleasably secure the mitered joints in abutting relation, said mitered joints having their chambers in communication with each other through the metal web below the sponge rubber strip at the point the joints abut.

3. In a multipane window sash construction having a sealed air pocket between adjacent panes of glass, the combination which includes a metal shell enclosing two chambers separated from each other by a metal web, said metal shell having spaced slotted openings along the inner face opening into each chamber adapted to accommodate the edgev portions of the glass panes, lip portions integral with the metal shell adjacent the slotted openings adapted to slip over and resiliently grip the edge portions of the glass panes, means to adjust the tension with which the lips grip the glass, sponge rubber strips mounted in the chambers on the wall opposite the slotted openings, a non-hardening putty lilling the remainder of the chambers, said metal shell having spaced sealable openings communieatingv with the chambers forv insertion of the put-ty, and coupling means carried by the metal shell adapted to hold sections of the metal shell in abutting relation, said abutting sections of the metal shell having their enclosed chambers in communication with each other through the separating metal web below the sponge rubber strips at the point of abutment.

GEORGE H. BUGENHAGEN.

REFERENCES CITED The following references are Vof record in the ille of this patent:

UNITED STATES PATENTS Number Name Date Re. 21,126 Axe June 2'7, 1939 1,000,413 Kane Aug. 15, 1911 1,242,815 Kohler Oct. 9, 191'7 2,173,649 Firner Sept. 19, 1939 2,221,005 Reese Nov. 12, 1940 2,239,528 Knudsen Apr. 22, 1941 2,278,694 Firner Apr. 7, 1942 2,402,105 Verhagen June 11, 1946 OTHER REFERENCES Railway Age Publication, Mar. 2, 1946,

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